#!/bin/sh

# Pull in and apply Conservancy website updates from the git repository.

#

# This is intended to be run on a timer. Note that it does *not* restart the

# Django application or run the migrate and collectstatic commands.

set -e

set -u

set -x

PRODUCTION_BRANCH="${PRODUCTION_BRANCH:-master}"

git_rev_name() {

    git rev-parse --abbrev-ref --symbolic-full-name "$@"

}

# If the checkout is not on the production branch,

# assume maintenance is happening and stop.

if [ "$(git_rev_name HEAD)" != "$PRODUCTION_BRANCH" ]; then

    exit 0

fi

# Abort if the production branch isn't tracking a remote branch.

if ! git_upstream="$(git_rev_name '@{upstream}' 2>/dev/null)"; then

    exit 3

fi

IFS=/ read git_remote git_refspec <<EOF

$git_upstream

EOF

git fetch --quiet --no-tags "$git_remote" "$git_refspec"

if [ "$(git rev-parse "$PRODUCTION_BRANCH")" = "$(git rev-parse "$git_upstream")" ]; then

    exit 0

fi

exitcode=0

git merge --quiet --ff-only "${git_remote}/${git_refspec}"

python3 -m compileall -q -x - conservancy || exitcode=$?

chgrp -R www-data conservancy || exitcode=$?

chmod -R g+rX-w,o+X-w conservancy || exitcode=$?

chmod -R o+r conservancy/static || exitcode=$?

exit "$exitcode"